KS2 Primary Maths Age 13-17 - Fractions, Decimals and Percentages: Adding and Subtracting Fractions - Explained

The video tutorial explains the process of adding fractions, emphasizing the need for a common denominator. It demonstrates how to find equivalent fractions and add them by summing the numerators. The tutorial also covers simplifying fractions and highlights that marks are awarded for finding equivalent fractions and adding numerators, not for simplification. The video concludes with a review of the rules for adding and subtracting fractions.

Why is it necessary to have the same denominator when adding or subtracting fractions?

• To make the fractions easier to multiply

• To simplify the fractions before adding

• To ensure the numerators are equal

• To accurately combine the fractions

What is the first step in finding an equivalent fraction for 5/7 with a denominator of 21?

• Divide the numerator by 3

• Multiply the denominator by 3

• Add 14 to the numerator

• Subtract 2 from the denominator

After converting 5/7 to an equivalent fraction with a denominator of 21, what is the new numerator?

• 21

• 15

• 5

• 10

Once the fractions 15/21 and 3/21 are added, what is the resulting fraction?

• 18/21

• 21/21

• 15/24

• 18/24

Is simplification necessary to receive full marks for the fraction addition problem?

• Only if the fraction is improper

• No, it is not required

• Yes, it is always required

• Only if the teacher specifies